Brake-shoe.



W. 0. STARK.

BRAKE SHOE.

APPLICATION FILED OOT. 7,1908.

Patented A 0,1909.

4 SHEETS-SHEET 1.

i Q Q orneys.

Inventor:

Witnesses:

W. 0. STARK.

BRAKE SHOE. APPLIOATION FILED 0OT.'I,1908.

Patented Apr. 20, 1909.

4 SHEETS-SHEET 2.

FIG.

' Inventor:

Witnesses Attorneys.

W. O. STARK.

BRAKE SHOE.

APPLIOATION FILED 00121, 1900.

4 SHEETS-SHEET 3.

Patented Apr. 20, 1909.

W. 0. STARK.

BRAKE SHOE.

APPLICATION 11.11]: now. 7,1908.

Patented Apr. 20, 1909.

4 SHEET8-8HEBT 4.

Inventor:

FIG. 17.

Witnesses:

Attorne 8- UNITED STATES PALIENT OFFICE.

WILLIAM O. STARK, OF CHICAGO, ILLINOIS, ASSIGNOR TO ILLINOIS MALLEABLEIRON COMPANY, OF CHICAGO, ILLINOIS, A CORPORATION OF ILLINOIS.

BRAKE-SHOE.

To all whom it may concern:

Be it known that I, WILLIAM C. STARK, a citizen of the United States,and resident of Chicago, in the county of Cook and State of Illinois,have invented certain new and useful Improvements in Brake-Shoes; and Ido hereby declare that the following description of my said invention,taken in connection with the accompanying sheets of drawings, forms afull, clear, and exact specification, which will enable others skilledin the art to which it appertains to make and use the same.

This invention has general reference to brake-shoes as shown in thecopending application of Frank T. Dickinson, Serial No. 460,586, filedNovember 2, 1908, upon which device the present invention is animprovement, and it consists, essentially, in the novel and peculiarcombination of parts and details of construction as hereinafter firstfully set forth and described, and then pointed out in the claims.

In the drawings already referred to, which serve to illustrate thisinvention more fully, Figure 1 is a plan of my improved brakeshoe andillustrating a flanged, reinforced, coach shoe. Fig. 2 is a longitudinalsectional elevation of the same taken on line verse section on line w wof Fig. 5.

'v v of Fig. 1, and Q; a of Fig. 3. Fig. 3 is a transverse sectionalelevation on line a u of Fig. 2. Fig. 4 is a plan of an unflangedbrake-shoe usually employed on the intermediary drivers of locomotives,on trolley cars &c., and Fig. 5 a longitudinal sectional elevation ofthe same, taken on line 1 y of Fig. 4 and z 2 of Fig. 6. Fig. 6 is atrans- Fi 7 is a plan of a fragment of the reinfording plate located onthe back of the brake-shoe. Fig. 8 is a longitudinal section of the sameon line a a of Fig. 7. Figs. 9, 10 and 11 are sectional views on line bb, c c, and d (i respectively of Fig. 7. Fig. 12 is a plan of a fragmentof that portion of said plate which covers the flange of the shoe, andFig. 13 is a sectional view in line 6 e of Fig. 12. Fig. 14 is asectional view of a brake-shoe similar to that shown in Fig. 3, exceptthat the rod-retaining bodies are not located in recesses in the plate.Figs. 15 to 20 inclusive are perspective views of the rod-retainingbodies, and showing various modifications of the same.

Specification of Letters Patent.

Application filed October 7, 1908.

Patented April 20, 1909.

Serial No. 456,565.

Like parts are designated by similar symbols and characters of referencein all the figures.

The object of this invention is the production of a reinforcedbrake-shoe composed. of several metals having different degrees ofhardness and tensile strength, whereby a brake-shoe of superiorwearing-qualities is produced, and one that can be manufactured at areasonable cost.

In brake-shoes for steam railway cars, steam, and electric locomotives,electric trolley cars, &c., it is desirable that a brakeshoe shall be soconstructed as to wear the longest possible time or to give the greatestbrake-shoe mileage. The body of the shoe, being usually of cast metal,is liable to break age when worn to a certain degree, thereby resultingin considerable loss of wearing-life, and also endangering the rollingstock and the lives of the passengers and the crew, owing to the dangerof derailing through broken shoes falling on the track, and accidentsresulting in consequence. To avoid these accidents and overcome theobjections mentioned, and produce a brake-shoe having a maximum ofdurability and brake-shoe mileage, I construct this brake-shoe,essentially, of a main body A, of gray iron, chilled iron, chilled orpartly chilled cast iron, white iron, steel or compositions of variousmetals which time and experience has demonstrated to be most desirable'l' or the kind of brake-shoe which it is desired to produce, and theuses to which it is to be put, when in service. This main body may be aflanged shoe, as shown in Figs. 1, 2 and 3, that is to say: a brake-shoewhich bears upon the tread of the car-wheel as well as upon the flangeof the same; or it may be a plain drivershoe which in use acts upon thetread of the wheel only, such a shoe being illustrated in Figs. l, 5 and6. This body A, being cast from a more or less fragile material, if notreinforced by a more malleable or tougher metal, is liable to break whensomewhat worn, and in order to avoid this breakage and to increase itswearing qualities to the longest possible time or brake-shoe mileage, Ilocate upon the back of this shoe a sheet-metal plate B, which platewill be of substantially the same width and length of the brake-shoe,and when placed into the mold in which the cast portion of the shoe isproduced prior to pouring the latter, will practically unite with thecast portion A to form a homogeneous body. In this plate I form,preferably, a series of depressions 2, of oblong contour and suitable deth, and in these depressions I produce oblbng apertures 3, for thepassage of the reentering lugs, and further oblong apertures 4, for theinsertion of the loop-portion of rodretaining bodies C, hereinafter tobe referred to. In the coach-shoe construction I also form, centrally inthe plate B a single oblong opening 5, illustrated in Figs. 2, and 3,for the reception of an attaching-lug I), to be hereafter more fullydescribed.

The rod-retaining bodies C are Wroughtiron, malleable iron, steel, orother sheetmetal bodies consisting of a loop-portion 6, horizontalmembers'7, and rentering lugs 8, the loop-portion being entered into theapertures 4, and the rentering lugs 8 through the apertures 3 in thesaid plate B. Into these rod-retaining bodies C there are placedanchoringuods E, of suitable diameter, said rods being curved or bent tocorrespond with the curvature of the plate B, and the loops soproportioned that when in position in the plate, the rods E lie ap)roxiinately close to the under side of said p ate, while the horizontalmembers 7 of said rod retaining bodies lie within, and flush with, orapproximately flush with, the outer surface of the plate B. Therentering lugs 8 of these rodretaining bodies C form, as it were,anchors within the body A, and are firmly embedded therein, but ifdesired, these rentering lugs 8 may be provided with additional,auxiliary anchors 9, and in Figs. 15 to 20 I have shown various shapesof these auxiliary anchors, thus, in Fig. 15 these auxiliary anchors areshown as consisting of circular projections on the end of said lugs,while in 16 the auxiliary anchors are illustrated as being circularapertures slotted or notched, as shown. In Fig. 18 I have shown theauxiliary anchors as being of dove-tail contour,

being, as it were, in the shape of dove-tail 'tenons, and in Fig. 19there is depicted the auxiliary anchor as consisting of a dove-tailshaped excision, all of these various constructions being modificationsof the device and equally effective and serviceable for the object inview. In some cases I prefer to further increase the reinforcing of themain body A by the introduction of auxiliary, but smaller, reinforcingrods, and in order to accomplish this object I form the rod-retainingbodies C with auxiliary loops 10, (and in Figs. 6 and 20 I have shownsuch a construction in detail,) and locate in these auxiliary loopsauxiliary rods F. In this manner the main body A is so much strengthenedthat it may be worn down until the auxiliary rods have been entirelyworn away, and still retain its solidity by the remaining main rods E.

The attaching lugs D are preferably made from a sheet-metal stamping andof rectangular contour, and having the usual apertures 12 as shown, butmalleable iron or steel castings may be resorted to if desired, and suchan attaching lug D is passed through the aperture 5 in the plate B andprojects into the body A a sufficient distance to be firmly an- So may Iform recesses in the rubbing surfaces of the main body and inserttherein bodies having different wearing properties, and I may recess thewearing face of the brakeshoe near the flange-portion where the wear ofthe rails upon the car-wheelsis such as to form grooves and shoulders inthe tread of the wheel, all such, more or less modern, means forproducing an effective brake-shoe being applicable in my presentconstruction.

It is evident that the plate, the rod-retaining bodies, and the rodswill be made from a ductile metal having sufficient tensile strengh andan ample coefficient of elongation and elasticity to prevent rupturewhen the brake-shoe is put to actual, and necessary severe, use.

I have heretofore described the preferred form of construction of theplate B, that is to say: producing the same with the depressions 2, sothat the rod-retaining bodies may be flush, or approximately flush, withthe outer surface of said plate B. This construction I may, however,vary by dispensing with these depressions, or not make them dee' enoughfor the rod-retaining bodies to be nush with the outer surface of theplate B. Such a modification of the plate is shown in Fig. 14, and isclearly within the scope of my invention.

Having thus described my invention, I claim as new and desire to secureto me by Letters Patent of the United States 1. A reinforced brake-shoeconsisting of a main body; a plate on the back of said main body, therebeing a series of apertures in said plate as described a series ofrod-retaining bodies passed into said apertures, and reinforcing rods insaid rod-retaining bodies; said rod-retaining bodies having reenteringlugs, as stated.

2. In a reinforced brake-shoe, a main body; a plate on the back of saidmain body, there being a series of apertures in said plate as described;a series of rod-retaining bodies passed into said apertures, andreinforcing rods in said rod-retaining bodies; said rodretaining bodieshaving reentering lugs and auxiliary anchors, as stated.

auxiliary loops thereon; and a series there being a series of apertures3. In a reinforced brake-shoe, a main body; a plate on the back of saidmain body, in said plate as described; a series of rod-retaining bodiespassed into said apertures, there being reentering lugs on saidrod-retaining bodies and of reinforcing rods in said rod-retainingbodies, as set forth.

4. In a reinforced brake-shoe, a niain body; a plate on the back of saidmain body,

' there as described a series of rod-retaining bodies eing a series ofapertures in said plate having rentering lugs located in said plate andthe main body; a series of reinforcing rods in said rod-retainingbodies, and a series of auxiliary rods in said main body. 5. In areinforced brake-shoe, a main body; a plate on the back of said mainbody, there being a series of apertures in said plate as described; aseries of rod-retaining bodies having rentering lugs as described passedinto said apertures; a series of reinforcing rods in said rod-retainingbodies, said rodretaining bodies being provided with auxiliary loops;and auxiliary reinforcing rods in said auxiliary loops, as stated.

6. In a reinforced brake-shoe, a main body; a plate on the back of saidmain body,

there being a series of apertures in said plate as described; a seriesof rod-retaining bodies in said plate and the main body; reenter-inglugs on said rod-retaining bodies, and a series of reinforcing rods insaid rod-retaining bodies; said rod-retaining bodies being pro videdWith auxiliary anchors and'auxiliary loops, as set forth.

7 In a reinforced brake-shoe, a main body; a plate on the back of saidmain body, there being a series of apertures in said plate as described;a series of rod-retaining bodies in said plate and the main body;rentering lugs on said rod-retaining bodies; a series of reinforcingrods in said rod-retaining bodies, said rod-retaining bodies beingprovided with auxiliary anchors, and auxiliary rods in said main body.

8. In a reinforced brake-shoe, a main body; a plate on the back of saidmain body, there belng a series of apertures in said plate as described;a series of rod-retaining bodies in said plate and the main body;reentering lugs on said rod-retaining bodies; a series of relnforeingrods in said rod-retaining bodies,

said rod-retaining bodies being provided with auxlhary anchors;auxiliary loops on sald rod-retaining bodies, and reinforcing rods insaid auxiliary loops, as set forth.

9. In a reinforced brakeshoe, a main body; a plate on the back of saidmain body, there being a series of depressions in said plate andapertures in said depressions; a series of rod-retaining bodies in saidapertures and the main body, and a series of reinforcing rods in saidrod-retaining bodies, said rodretaining bodies having reentering lugs asspecifier 10. In a reinforced brake-shoe, a main body; a plate 011 theback of said main body, there being a series of depressions in saidplate and apertures in said depressions; a series of rod-retainingbodies in said apertures and the main body, and a series of reinforcingrods in said rod-retaining bodies, said rodretaining bodies havingreenter-ing lugs and auxiliary anchors as stated.

11. In a reinforced brake-shoe, a main body; a plate on the back of saidmain body, there being a series of depressions in said plate andapertures in said depressions; a series of rod-retaining bodies in saidapertures and the main body, and a series of reinforcing rods in saidrod-retaining bodies, said rodretaining bodies having reontering lugsand auxiliary anchors, as stated.

12. In a reinforced brake-shoe, a main body; a plate on the back of saidmain body, there being a series of depressions in said plate andapertures in said depression; a se ries of rod-retaining bodies in saidapertures and the main body, said rod-retaining bodies having reenteringlugs as described; a series of reinforcing rods in said rod-retainingbodies, and a series of auxiliary reinforcing rods in said main body, asspecified.

13. In a reinforced brake-shoe, a main body; a plate on the back of saidmain body, there being a series of depressions in said plate andapertures in said depressions; a series of rod-retaining bodies in saidapertures and the main body, said rod-retaining bodies havingreenter-ing lugs and auxiliary loops; a series of reinforcing rods insaid rod-retalning bodies, and a series of auxiliary rods in saidauxiliary loops, as stated.

14. In a-reinforced brake shoe, a main body; a plate on the back of saidmain body, there being a series of depressions in said plate and aseries of apertures in said depressions; a series of rod-retainingbodies in said apertures and the main bod having reentering lugs,auxiliary anchors and auxiliary loops fornied integral With the mainloop; a series of reinforcing rods in said niain loop, and a series ofreinforcing rods in the auxiliary loops, as stated.

15. In a reinforced brake shoe, a main body; a plate on the back of saidmain body, there being a series of depressions in said plate and aseries of apertures in said depression; a series of rod-retaining bodiesin said apertures and the main body having reentering lugs and auxiliaryanchors as described, and auxiliary loops all formed integral With themain loop; a series of reinforcing rods in said main loop and a seriesof auxiliary reinforcing rods in said main body, as set forth.

16. In a reinforced brake-shoe, a main body; a plate on the back of saidmain body, there being a series of depressions in said plate and aseries of apertures in said depressions; a series of rod-retainingbodies in said apertures and the main body having reentering lugs andauxiliary anchors on said lugs and auxiliary loops, all formed integralwith the main loop; a series of reinforcing rods in said main loops anda series of auxiliary rods in the auxiliary loops, as mentioned.

17. In a reinforced brake-shoe, a main body; a plate on the back of themain body, there being a series of apertures in said plate as described;a series of rod-retaining bodies in said apertures and the main body;reinforcing rods in said rod-retaining bodies, and an attaching-lugprojecting from said plate and entering and anchored in said main body;there being reentering-lugs on said rod-retaining bodies anchored insaid main body, as stated.

18. In a reinforced brake-shoe, a main body; a plate on the back of saidmain body, there being a series of a ertures in said plate as described;a series of rod-retaining bodies in said main body and the rods in saidrod-retaining bodies and an attaching-lug projecting from said plate andentering and anchored in said main body, there being reentering lugs onsaid rod-retaining bodies and auxiliary anchors on said lugs, asdescribed.

19. In a reinforced brakeshoe, a main body; a plate on the back of saidmain body, there being a series of apertures in said plate as described;a series of rod-retaining bodies in said plate and the main body;reinforcing rods in said rod-retaining bodies; and an attaching-lugprojecting from the back of said late and entering in part, and beinganchored in said main body; there being reentering lugs on saidrod-retaining bodies and auxiliary loops thereon, the whole being formedinto a homogeneous body by the main body being cast onto the assembledreinforcing parts.

20. In a reinforced brakeshoe, a main body; a plate on the back of saidmain body, there being a series of apertures in said plate as described;a series of rod-retaining bodies in said apertures and the main body;reinforcing rods in said rod-retaining bodies; and an attaching lugprojecting from the back of said plate and entering, in part, and beinganchored in said main body; there being reentering lugs on saidrod-retaining bodies and auxiliary rods in said main body, the wholebeing formed into a homogeneous body by the main body being cast ontothe assembled reinforcing parts, as set forth.

21 In a reinforced brake-shoe, a main body; a plate on the back of saidmain body, there being a series of apertures in said plate plate;reinforcing as described; a series of rod-retaining bodies in saidapertures and the main body; reinforcing rods in said rod-retainingbodies; and an attaching lug projecting from the back of said anchoredin said main body; there being reentering lugs on said rod-retainingbodies and auxiliary loops the auxiliary loops being formed integralwith the main loops; and auxiliary reinforcing rods in said auxiliaryloops, the whole being formed into a homogeneous body by the main bodybeing cast onto the assembled reinforcing parts, as set forth.

22. In a reinforced brake-shoe, a main body; a plate on the back of saidmain body, there being a series of apertures in said plate as described;a series of {'06 i-retaining bodies plate and entering, 1n part, andbeing thereon, said lugs and in said apertures and the main body; rein}forcing rods in said rod-retaining bodies; and an attaching lugprojecting from the back of said plate and passing, in part, throughsaid plate into, and being anchored in said main body; there beingrentering lugs, auxiliary anchors, and auxiliary loops on saidrod-retaining bodies which are formed integral with the main loopthereof, the whole being formed into a homogeneous body by the main bodybeing cast onto the assembled reinforcing parts, as stated.

23. In a reinforced brake-shoe, a main body; a plate on the back of saidmain body, there being a series of apertures in said plate; asdescribed; a series of rod-retaining bodies in said apertures and themain body; reinforcing rods in said rodretaining bodies; and anattaching lug projecting from the back of said plate and passing, inpart, through said plate into, and being anchored in said main body;there being rentering lugs and auxiliary anchors on said rod-retainingbodies formed integral with the main loop thereof, and auxiliaryreinforcing rods in said main body, the whole being formed into ahomogeneous body by the main body being cast onto the assembledreinforcing parts, as set forth.

24. In a reinforced brake-shoe, a main body; a plate on the back of saidmain body, there being a series of apertures in said plate as described;a series of rod-retaining bodies in said apertures and the main body;reinforcing rods in said rod-retaining bodies; and an attaching lugprojecting from the back of said plate and passing, in part, throughsaid plate into, and being anchored in said main body; there beingreentering lugs, auxiliary anchors and auxiliary loops on saidrod-retaining bodies and formed integral with the main loop; andauxiliary reinforcing rods in said auxiliary loops, the whole beingformed into a homogeneous body by the main body being cast onto theassembled reinforcing parts, as specified.

g 25. In a reinforced brake-shoe, a main body; a plate on the back ofsaid main body, there being a series of depressions in said plate and aseries of apertures in said depressions as described; a series ofrod-retaining bodies in said apertures and the main body; reinforcingrods in said rod-retaining bodies: and an attaching lug projecting fromthe back of said plate and passing, in part, through said plate into,and being anchored in said main body, there being reentering lugs onsaid rod-retaining bodies anchored in said main body, as specified.

26. In a reinforced brake-shoe, a main body; a plate on the back of saidmain body, there being a series of depressions on said plate and aseries of apertures in said depressions as described; a series ofrod-retaining bodies in said apertures and the main body; reinforcingrods in said rod-retaining bodies; and an attaching lug projecting fromthe back of said plate and passing, in part, through said plate into,and being anchored in said main body; there being reentering lugs onsaid rod-retaining bodies and auxiliary anchors on said lugs, saidreenter-ing lugs and auxiliary anchors being formed integral with themain loop; the whole being formed into a homogeneous body by the mainbody being cast onto the assembled reinforcing' parts, as specified.

27. In a reinforced brake-shoe, a main body, a plate on the back of saidmain body, there being a series of depressions in said plate and aseries of apertures in said depressions; a series of rod-retainingbodies in said plate and the main body; reinforcing rods in saidrod-retaining bodies; and. an attaching lug projecting from the back ofsaid plate and entering, in part, and being anchored in said main body;there being reentering lugs on said rod-retaining bodies, and auxiliaryloops thereon, the whole being formed into a homogeneous body by themain body being cast onto the assembled reinforcing parts, as stated.

28. In a reinforced brake-shoe, a main body; a plate on the back of saidmain body, there being a series of depressions in said plate and aseries of apertures in said depressions; a series of rod-retainingbodies in said apertures and the main body; reinforcing rods in saidrod-retaining bodies; and an attaching lug projecting from the back ofsaid plate and passing, in part, through said plate into and beinganchored in said main body; there being rot-Entering lugs on saidrod-retaining bodies and auxiliary rods in said main body, the wholebeing formed into a homogeneous body by the main body being cast ontothe assembled reinforcing parts, as specified.

29. In a reinforced brake-shoe, a mam body; a plate on the back of saidmain body, there being a series of depressions in said plate and aseries of apertures in said depressions; a series of rod-retainingbodies in said apertures and the main body; reinforcing rods in saidrod-retaining bodies; and an attaching lug projecting from the back ofsaid plate and passing, in part, through said plate into and beinganchored in said main body; there being rentering lugs on saidrod-retaining bodies and auxiliary loops thereon said lugs and auxiliaryloops being formed integral with the main loop; and auxiliaryreinforcing rods in said auxiliary loops, the whole being formed into ahomogeneous body by the main body being cast onto the assembledreinforcing parts, as stated.

30. In a reinforced brake-shoe, a main body; a plate on the back of saidmain body, there being a series of depressions in said plate and aseries of apertures in said depressions as described; a series ofrod-retaining bodies in said plate and the main body; reinforcing rodsin said rod-retaining bodies, and an attaching lug projecting from theback of said plate and passing, in part, through said plate into andbeing anchored in said main body; there being reentering lugs auxiliaryanchors, and auxiliary loops on said rod-retaining bodies which areformed integral with the main loop thereof; the whole being formed intoahomogeneous body by the main body being cast nto'the assembledreinforcing parts, as set forth.

31. In a reinforced brake-shoe, a main body; a plate on the back of saidmain body, there being a series of depressions in said plate and aseries of apertures in said depressions, as described; a series ofrod-retaining bodies in said apertures and the main body reinforcingrods in said rod-retaining bodies; and an attaching lug projecting fromthe back of said late and passing, in part, through said p ate into andbeing anchored in said main body; there being ree'nteringlugs andauxiliary anchors on said rod-retain ing bodies formed integral with themain loop thereof; and auxiliary reinforcing rods in said main body; thewhole being formed into a homogeneous body by the main body being castonto the assembled reinforcing parts as specified.

32. In a reinforced brake-shoe, a main body; a series of depressions in,and in combination with, a plate on the back of said main body, therebeing a series of apertures in said depressions as described; a seriesof rod-retaining bodies in said apertures and the main body; reinforcingrods in said rod-retaining bodies; and an attaching lug projecting fromthe back of said plate and passing, in part, through said plate into andbeing anchored in said main body; there being reentering lugs, auxiliaryanchors, and auXil- I In testimony that I claim the foregoing as iaryloops on said rod-retaining bodies and my invention I have hereunto setmy hand formed integral with the main loop; and auxin the presence oftwo subscribing Witnesses. 10 iliary reinforcing rods in said auxiliaryloops, WILLIAM O. STARK.

the Whole being formed into a homogeneous I Attest: body by the mainbody being cast onto the MICHAEL J. STARK, assembled reinforcing parts,as specified. l O. KNUDsEN.

